Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180]
"Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.002359/0.002359, allocations: 89.48 kB / 19.44 MB, free: 336 kB / 13.93 MB
"
[Timeout remaining time 180]
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180]
"Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.002773/0.002773, allocations: 169.6 kB / 22.76 MB, free: 1.664 MB / 18.57 MB
"
[Timeout remaining time 180]
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180]
"Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 1.538/1.538, allocations: 177.1 MB / 203.1 MB, free: 5.629 MB / 186.7 MB
"
[Timeout remaining time 178]
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS master/package.mo", uses=false) [Timeout 180]
"[/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS master/Examples/PPD12/Structure.mo:531:21-535:34:writable] Warning: Lexer treating \\ as \\\\, since \\e is not a valid Modelica escape sequence.
[/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS master/Examples/PPD12/Structure.mo:531:21-535:42:writable] Warning: Lexer treating \\ as \\\\, since \\< is not a valid Modelica escape sequence.
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS master/package.mo): time 1.328/1.328, allocations: 154.8 MB / 414.4 MB, free: 464 kB / 378.7 MB
[/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS master/Utilities/Cryptographics/BaseClasses/sha.mo:2:1-19:8:writable] Warning: External function annotation should occur on the external-clause, not on the function.
[/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS master/Utilities/File/sha2.mo:2:1-9:9:writable] Warning: External function annotation should occur on the external-clause, not on the function.
"
[Timeout remaining time 178]
Using package IDEAS with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS master/package.mo)
Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo)
Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo)
Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo)
Running command: translateModel(IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow,tolerance=1e-08,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow")
translateModel(IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow,tolerance=1e-08,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow") [Timeout 660]
"Notification: Performance of FrontEnd - loaded program: time 1.552e-06/1.552e-06, allocations: 0 / 0.5199 GB, free: 2.258 MB / 490.7 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 2.526e-05/2.681e-05, allocations: 7.156 kB / 0.5199 GB, free: 2.254 MB / 490.7 MB
Notification: Performance of NFInst.instantiate(IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow): time 0.5377/0.5377, allocations: 187.5 MB / 0.7029 GB, free: 47.28 MB / 0.6355 GB
Notification: Performance of NFInst.instExpressions: time 0.008963/0.5467, allocations: 5.832 MB / 0.7086 GB, free: 47.18 MB / 0.6355 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.001336/0.548, allocations: 56.95 kB / 0.7087 GB, free: 47.18 MB / 0.6355 GB
Notification: Performance of NFTyping.typeComponents: time 0.001439/0.5494, allocations: 0.5471 MB / 0.7092 GB, free: 47.18 MB / 0.6355 GB
Notification: Performance of NFTyping.typeBindings: time 0.004556/0.554, allocations: 1.967 MB / 0.7112 GB, free: 47.09 MB / 0.6355 GB
Notification: Performance of NFTyping.typeClassSections: time 0.002861/0.5569, allocations: 1.239 MB / 0.7124 GB, free: 47.06 MB / 0.6355 GB
Notification: Performance of NFFlatten.flatten: time 0.003209/0.5601, allocations: 3.067 MB / 0.7154 GB, free: 46.65 MB / 0.6355 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.001203/0.5613, allocations: 0.8558 MB / 0.7162 GB, free: 46.57 MB / 0.6355 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.003858/0.5651, allocations: 1.676 MB / 0.7178 GB, free: 46.41 MB / 0.6355 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.001909/0.567, allocations: 0.9381 MB / 0.7187 GB, free: 46.33 MB / 0.6355 GB
Notification: Performance of NFPackage.collectConstants: time 0.000201/0.5672, allocations: 125.1 kB / 0.7189 GB, free: 46.33 MB / 0.6355 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.00249/0.5697, allocations: 1.214 MB / 0.7201 GB, free: 46.2 MB / 0.6355 GB
Notification: Performance of NFScalarize.scalarize: time 0.0006393/0.5704, allocations: 0.6302 MB / 0.7207 GB, free: 46.13 MB / 0.6355 GB
Notification: Performance of NFVerifyModel.verify: time 0.0009322/0.5713, allocations: 0.5236 MB / 0.7212 GB, free: 46.08 MB / 0.6355 GB
Notification: Performance of NFConvertDAE.convert: time 0.003659/0.575, allocations: 2.394 MB / 0.7235 GB, free: 45.88 MB / 0.6355 GB
Notification: Performance of FrontEnd - DAE generated: time 5.62e-06/0.575, allocations: 6.469 kB / 0.7235 GB, free: 45.88 MB / 0.6355 GB
Notification: Performance of FrontEnd: time 1.543e-06/0.575, allocations: 0.9688 kB / 0.7235 GB, free: 45.88 MB / 0.6355 GB
Notification: Performance of Transformations before backend: time 2.414e-05/0.575, allocations: 0 / 0.7235 GB, free: 45.88 MB / 0.6355 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 248
 * Number of variables: 248
Notification: Performance of Generate backend data structure: time 0.002836/0.5778, allocations: 1.773 MB / 0.7253 GB, free: 45.01 MB / 0.6355 GB
Notification: Performance of prepare preOptimizeDAE: time 4.328e-05/0.5779, allocations: 9.906 kB / 0.7253 GB, free: 45.01 MB / 0.6355 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002278/0.5801, allocations: 451.1 kB / 0.7257 GB, free: 44.9 MB / 0.6355 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.001713/0.5819, allocations: 0.8642 MB / 0.7265 GB, free: 44.62 MB / 0.6355 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.832e-05/0.5819, allocations: 76.5 kB / 0.7266 GB, free: 44.62 MB / 0.6355 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001669/0.5821, allocations: 111.4 kB / 0.7267 GB, free: 44.62 MB / 0.6355 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.001633/0.5837, allocations: 1.273 MB / 0.728 GB, free: 43.93 MB / 0.6355 GB
Notification: Performance of preOpt findStateOrder (simulation): time 3.196e-05/0.5838, allocations: 11.17 kB / 0.728 GB, free: 43.93 MB / 0.6355 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001045/0.5839, allocations: 46.77 kB / 0.728 GB, free: 43.93 MB / 0.6355 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.456e-05/0.5839, allocations: 39.81 kB / 0.7281 GB, free: 43.92 MB / 0.6355 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001332/0.5852, allocations: 0.618 MB / 0.7287 GB, free: 43.92 MB / 0.6355 GB
Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts.
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.006351/0.5916, allocations: 3.097 MB / 0.7317 GB, free: 43.28 MB / 0.6355 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0007679/0.5924, allocations: 432.2 kB / 0.7321 GB, free: 43.23 MB / 0.6355 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0004106/0.5928, allocations: 221.7 kB / 0.7323 GB, free: 43.22 MB / 0.6355 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0001695/0.5929, allocations: 29.56 kB / 0.7323 GB, free: 43.22 MB / 0.6355 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.985e-05/0.593, allocations: 48.53 kB / 0.7324 GB, free: 43.18 MB / 0.6355 GB
Notification: Performance of pre-optimization done (n=53): time 2.305e-06/0.593, allocations: 4.75 kB / 0.7324 GB, free: 43.17 MB / 0.6355 GB
Notification: Performance of matching and sorting (n=55): time 0.003624/0.5966, allocations: 1.471 MB / 0.7338 GB, free: 42.73 MB / 0.6355 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 2.521e-05/0.5966, allocations: 58.31 kB / 0.7339 GB, free: 42.67 MB / 0.6355 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009346/0.5976, allocations: 0.8438 MB / 0.7347 GB, free: 42.46 MB / 0.6355 GB
Notification: Performance of collectPreVariables (initialization): time 5.563e-05/0.5976, allocations: 38.3 kB / 0.7347 GB, free: 42.43 MB / 0.6355 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0003981/0.598, allocations: 0.6235 MB / 0.7353 GB, free: 42.11 MB / 0.6355 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0001856/0.5982, allocations: 224.8 kB / 0.7356 GB, free: 41.97 MB / 0.6355 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002669/0.5985, allocations: 163.3 kB / 0.7357 GB, free: 41.94 MB / 0.6355 GB
Notification: Performance of setup shared object (initialization): time 0.0002408/0.5987, allocations: 0.6185 MB / 0.7363 GB, free: 41.44 MB / 0.6355 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003966/0.5991, allocations: 171.1 kB / 0.7365 GB, free: 41.44 MB / 0.6355 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005124/0.5996, allocations: 441.2 kB / 0.7369 GB, free: 41.18 MB / 0.6355 GB
Warning: It was not possible to determine if the initialization problem is consistent, because of not evaluable parameters/start values during compile time: volDyn.dynBal.medium.p = volDyn.dynBal.p_start (bou.p = volDyn.dynBal.p_start)
Notification: Performance of analyzeInitialSystem (initialization): time 0.003466/0.6031, allocations: 1.281 MB / 0.7382 GB, free: 40.96 MB / 0.6355 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.532e-06/0.6031, allocations: 0 / 0.7382 GB, free: 40.96 MB / 0.6355 GB
Notification: Performance of matching and sorting (n=84) (initialization): time 0.001354/0.6044, allocations: 0.7064 MB / 0.7388 GB, free: 40.84 MB / 0.6355 GB
Notification: Performance of prepare postOptimizeDAE: time 1.857e-05/0.6045, allocations: 9.5 kB / 0.7389 GB, free: 40.84 MB / 0.6355 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.869e-06/0.6045, allocations: 4.438 kB / 0.7389 GB, free: 40.84 MB / 0.6355 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0001904/0.6047, allocations: 84.91 kB / 0.7389 GB, free: 40.8 MB / 0.6355 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000663/0.6053, allocations: 151.1 kB / 0.7391 GB, free: 40.8 MB / 0.6355 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002641/0.608, allocations: 5.554 MB / 0.7445 GB, free: 35.62 MB / 0.6355 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009998/0.609, allocations: 25.94 kB / 0.7445 GB, free: 35.62 MB / 0.6355 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.505e-05/0.609, allocations: 26.02 kB / 0.7446 GB, free: 35.62 MB / 0.6355 GB
Warning: The initial conditions are over specified. The following 1 initial equations are redundant, so they are removed from the initialization system:
         volDyn.dynBal.medium.p = volDyn.dynBal.p_start.
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 17
 * Number of states: 0 ()
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (80):
 * Single equations (assignments): 77
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 3
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 0 systems
 * Non-linear torn systems (#iteration vars, #inner vars): 3 systems
   {(1,1), (1,1), (1,2)}
Notification: Performance of prepare postOptimizeDAE: time 0.0004924/0.6095, allocations: 280.4 kB / 0.7448 GB, free: 35.46 MB / 0.6355 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001693/0.6097, allocations: 108.3 kB / 0.7449 GB, free: 35.41 MB / 0.6355 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001854/0.6099, allocations: 95.28 kB / 0.745 GB, free: 35.39 MB / 0.6355 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.648e-06/0.6099, allocations: 5.719 kB / 0.745 GB, free: 35.39 MB / 0.6355 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 8.205e-06/0.6099, allocations: 3.625 kB / 0.745 GB, free: 35.39 MB / 0.6355 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0008018/0.6107, allocations: 0.5852 MB / 0.7456 GB, free: 35.12 MB / 0.6355 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002996/0.6137, allocations: 1.764 MB / 0.7473 GB, free: 34.64 MB / 0.6355 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.392e-06/0.6137, allocations: 5.844 kB / 0.7473 GB, free: 34.64 MB / 0.6355 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006155/0.6143, allocations: 131.8 kB / 0.7475 GB, free: 34.64 MB / 0.6355 GB
Notification: Performance of postOpt tearingSystem (simulation): time 9.294e-05/0.6144, allocations: 40.03 kB / 0.7475 GB, free: 34.62 MB / 0.6355 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.969e-05/0.6144, allocations: 15.94 kB / 0.7475 GB, free: 34.62 MB / 0.6355 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000844/0.6153, allocations: 1.856 MB / 0.7493 GB, free: 32.9 MB / 0.6355 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.707e-06/0.6153, allocations: 6.938 kB / 0.7493 GB, free: 32.9 MB / 0.6355 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001266/0.6165, allocations: 0.9803 MB / 0.7503 GB, free: 32.48 MB / 0.6355 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0004751/0.617, allocations: 158.5 kB / 0.7504 GB, free: 32.44 MB / 0.6355 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001161/0.6171, allocations: 14.59 kB / 0.7504 GB, free: 32.44 MB / 0.6355 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006532/0.6178, allocations: 31.08 kB / 0.7505 GB, free: 32.43 MB / 0.6355 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001106/0.6179, allocations: 53.62 kB / 0.7505 GB, free: 32.43 MB / 0.6355 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.254e-05/0.618, allocations: 31.28 kB / 0.7506 GB, free: 32.43 MB / 0.6355 GB
Notification: Performance of sorting global known variables: time 0.0005242/0.6185, allocations: 0.4999 MB / 0.751 GB, free: 32.3 MB / 0.6355 GB
Notification: Performance of sort global known variables: time 7e-08/0.6185, allocations: 0.9688 kB / 0.751 GB, free: 32.3 MB / 0.6355 GB
Notification: Performance of remove unused functions: time 0.001063/0.6195, allocations: 308.3 kB / 0.7513 GB, free: 32.29 MB / 0.6355 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 14
 * Number of states: 3 (volDyn.dynBal.medium.Xi[1],volDyn.dynBal.U,volDyn.dynBal.mC[1])
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (53):
 * Single equations (assignments): 52
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 1
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 0 systems
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(1,2)}
Notification: Performance of Backend phase and start with SimCode phase: time 0.0003115/0.6199, allocations: 180.6 kB / 0.7515 GB, free: 32.2 MB / 0.6355 GB
Notification: Performance of simCode: created initialization part: time 0.001268/0.6211, allocations: 0.9957 MB / 0.7525 GB, free: 31.67 MB / 0.6355 GB
Notification: Performance of simCode: created event and clocks part: time 5.49e-06/0.6211, allocations: 2.906 kB / 0.7525 GB, free: 31.67 MB / 0.6355 GB
Notification: Performance of simCode: created simulation system equations: time 0.000469/0.6216, allocations: 431.9 kB / 0.7529 GB, free: 31.42 MB / 0.6355 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00232/0.6239, allocations: 0.5422 MB / 0.7534 GB, free: 31.3 MB / 0.6355 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002826/0.6267, allocations: 1.921 MB / 0.7553 GB, free: 30.21 MB / 0.6355 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004713/0.6272, allocations: 0.5505 MB / 0.7558 GB, free: 30.05 MB / 0.6355 GB
Notification: Performance of simCode: alias equations: time 0.0006867/0.6279, allocations: 197.2 kB / 0.756 GB, free: 30 MB / 0.6355 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001998/0.6281, allocations: 68.41 kB / 0.7561 GB, free: 30 MB / 0.6355 GB
Notification: Performance of SimCode: time 1.212e-06/0.6281, allocations: 0 / 0.7561 GB, free: 30 MB / 0.6355 GB
Notification: Performance of Templates: time 0.0292/0.6573, allocations: 19.99 MB / 0.7756 GB, free: 27.89 MB / 0.6355 GB
"
[Timeout remaining time 659]
make -j1 -f IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.makefile [Timeout 660]
(rm -f IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.sim & ./IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow -abortSlowSimulation -alarm=240  -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.MixingVolumes.Validation.MixingVolumeTraceSubstanceReverseFlow.pipe 2>&1) [Timeout 240]
[Calling sys.exit(0), Time elapsed: 7.253529244102538]